It is definitely your bad installation and all other issues you have reported are around the same topic. Please make sure that your server met the requirements as well as check your re-write rules setup for this virtual host. Besides, check if CSS / JS generated by ezjscore is correct (use Firebug or built-in www inspector in your browser)

it works... with the ezdemo_democontent package... the ezdemo_democontent_clean package still have the error...and my DNS-Setup... I just set the wildcards... with an extra A record for the admin access it works... but only with the ezdemo_democontent package...

it works... with the ezdemo_democontent package... the ezdemo_democontent_clean package still have the error...and my DNS-Setup... I just set the wildcards... with an extra A record for the admin access it works... but only with the ezdemo_democontent package...

I have the same problem, with the demo content it work without it will not work.